Rock-drill or rock-drilling machine.



N03 816,090. I y. PATBNTEDJMAR. 27, 190.6.

n. HELLMA'N a; L. c. BAYLES. Roux DRILL 0R ROGK DRILLING MACHINE.

nrmoumx nun ma.1s.1po4.

a sums-43mm 1.

'K'III:

v UNI EDYsTATEs HEN Y HELLMAN AND LEWIS cou ler BAYLES, oFrJoHAN Es'BURG, TRANSVAAL;

'nocK-omLLoP' ROCK-DRILLING} iv' IXoI-IINEQ These'giximprovements have reference to to rock-drilling machines or engines, and are ap-' plicable to machines in which a valve is employed forcontrolling the admission of the com ressed air or other actuating gaseous fluid to the cylinder on the principle ofan [5 axial-valve chipping or riveting machine or to a machine inwhich, a'valve'is dispensed with and the piston or equivalent reciprocating member itself controls the admission of the motive fluid tosaid cylinder on the prin-.

2o ciple, of a valveless chipping-hammenas well as to other similar types'ofsuch machines.

The improvements constituting our-pres-' ,ent invention relate, first," to means 'for,

mounting or securing the cylinder of the 2 5 machine or en ine in its supporting shell or cradle; second to means for feeding the machine'or for traversing the cylinder longis.

tud-inally of said: shell or cradle; "thirdly, to

means for rotating the cylinder, and with,it' the drilling-bit or cutting-tool; fourthly, to, means for introdu'cin the actuatin or mo-;'

' tive fluid into the cy inder, and, thly, to

the general construction and arrangement of the machine .orengine, as hereinafter de scribed, and more particularly pointed out in the appended claims... i 4

. A rock-drilling'machine or engine embodying the features of this invention is of compact, simple, and light construction and is '40 capable of being readily manipulated under.

all ordinar circumstances;

To simp ify and facilitate the description of the. several improvements, -we append drawings thereof, in connection with which; we will describes'aid improvements in detail.

' In the drawings, Figure 1 is a side -'elevation ofa; complete-machine or e' ine designed to o crate-without a valve ig. 2, a longitudin section of the same; 3;, a 5otransverse section on liner :0, Fig. 2; ig '4,

' a transverse section on line 'y y, Fig. 2; Fig 5,

' a transverse section; on line z :2, Fig. 2. ig.

6 is-a longitudinal section; of a portion of the drill-cylinder, showing the position the piston Specification of Letters Patnt 1 Application filed-Magnet 15,1904. Serial No. 220.698. i

I nal section ofa machine or engine inwhich a.

chine'is automatically put out of operation.

trated in Figs." 1 to 6 the drill-cylinder (indioated atul) is mounted in and slidably sup- :atentecl march 27, 1.906.

- assumes when under certain. circumstances the machine'is automatically put out of oper- I ation.. Fig. 7 represents a side elevation-of." 3 the machine. shoyvn in Figs. 1 to 6, illustrating a slight modification; Fig. 8, a longitudi-. p

valve is employed for controlling the admis- 'sion of the actuating fluid; Fig. 9 is a longitudinal section of a portion of the cylinder,;

showing the position the,'piston assumes when under certain circumstances the ma- Fig. 10 is a side elevation of the'machine shown ,in Figs. 8 and 9, illustrating a slight modification. v i Similar characters ofreference indicate the same or similar 7 parts in the several figures of the drawings. s

Referrin to the machine or engine illus- I ported by the shell, cradle, or carriage 2.- To the forward end of the shell or cradle 2 is bolted or otherwise secured the forward guide 3'for the drill-cylinder 1. The shell or cradle 2 may be formed or provided with the cone 2 for-mounting it in the ordinary or-any other convenient manner or with any other suitable device for the same purpose. Round.

the drill-cylinder 1, in'proxlmity to the rear end thereof, is formed an annular projection A, and encircling the cylinder at the rear of said projection 4 is a loose sleeve 5. The loose sleeve 5, as shown in Figs. 1, 2, and 4', is constructed with a downward extension 6, formed withv longitudinal ribs or wings -7, which fit into and are free to slidein guide ways 8, formed longitudinally of the shell or cradle .2. .Thelongitudinal member 2 of the shell or cradle is constructed with the longitudinal inward rejections 9, which form a box-slot in-whic the ribs or wings 7 are free .toslide; (See s. 3,4, and 5.) 'In the lower portion 6 o the loose sleeve 5 is arranged-a bushing formed with an internal thread, which constitutes the feed-hut 10. A nut 11', screwed over'the front-end of ,the bushing 1( serves to secure'the latter in position between it and the head or, flange 12, formed at the otherend; Arranged lo 'tu-.

dinally'of the shell or cradle 2 is the eed screw 13. His shown located in bearings 14 15in the front guide 3 at one: end-and in the end of the shell or cradle 2 at the' .o therL I At the rear-extremity of the feed-screw 13 is secured the crank 16, which is provided for rotating the screw 13 in either direction to traverse the cylinder 1 Ion 'tudinally in the shell or cradle 2. The feei screw 13 is preferably formed with a square thread, the

' thread in the feed-nut bein made to correspond. On the rear end of t e cylinder 1 is I screwed or-otherwise fixed the cap or cover 17. This cover 17 is formed with circumferential teeth 18 (see Fig. 3) and at the rear of the teeth 18 with a flange or shroud 19. The feed-screw 13 formedwith a longitudinal groove or feather-way 20, and arranged on said screw 13 is a small toothed wheel or pinion 21 This pinion 21 is constructed so that it'is capable of sliding longitudinally of the feed-screw 13, but is prevented'rot'ating inde vpendently on said screw. This is "accom plished by in the center ofthe pinion 21 a feather-key 22, which projects into and traverses the longitudinal feather-way 20 in the feed-screw 13. The pinion 21 meshes or gears with the teeth 18, formed round the cap or cover17 inside the flange 19. It will I now be perceived that when the feed-screw 13- is rotated by the crank 16 the sleeve 5,

'- supporting therear end-of thecylinder 1, is

traversed longitudinally in the guideways 8 in the cradle 2, which sleeve 5-carries with it and advances or recedes the cylinder-1, ac

-.cordin'g tothe direction of rotation of the the actuating fluid-supply pipe 25. The nipcates wit ple 23 communicates with-a .port 26, formed in the ca i117, which latter port 26 communia port 27 formed longitudinally of thecylinder 1, along which the actuating fluid is conducted into thecylinden 1.. The; drilling-bit (not shown in .the drawings) is carrie by-thefront end of-the cylinder-"1. In the dra we show an arrangementfor receiving an transmit theim 'acts of the reciprocating piston to t e (112111 it, which is described a plication for; patent filed by us under" Seriai Not-210,519 on the'31st' of May, 1904. Although we prefer to adopt this construction, we wish it to be understoodthat any other suitable arrangement may be used in substitution therefor. The shank-cap or'impactiece 28 is projected into, the bore of the cylinder '1 and formed with; an enlarged forwardl-"extremity 29, which fits into aceunterbore 30 in the front end ofthe cylinder 1. Theimpact-piece 28 is formed with a recess 31 in the front end, into which the extremity of the drilling-bit or cutting-tool is projected. As the piston 32 reci rocates in the cylinder 1 it impinges upon t e inner end of the impactiece 28, which transmits the blow to the 'dri l or bit. On the front end of the cylinder 1 is fixed the front head 33, and between the front head 33 and the end of the cylinder 1 are located a ring or washer 35, of metal. The ole '31 in the front head 33 may be made of square or of corresponding square or polygonal section formed on the shank of the drill or hit to insure the rotation of the drill-bit in unison with the drill-cylinder. Other means may be rovided to accomplish this. The actuating fluid, which passes along the port 27 into the power-cylinder 1, passes from the latter into the in- 37 is anannu ar recess in the interior of the cylinder, and 38 39 are ports opening to the exterior of said cylinder. The recess 37 and ports 38 39 constitute the exhaustports, through which the operating fluid may esca e from the piston 32 when it is moved su ciently far to place the interior of the piston the port 36. The ports 38 39 are, as shown, preferably formed at o posite sides of the recess 37, so that when t e cylinder 1 is passing through the; front guide 3 one or other of the ports 38 39 will alwa s be open.

' The operation of t e piston 32 in the working. of the machine or engine may be briefly described as follows: The operating flu d is continuously admitted into' the c linder 1 32 is shown in theposit? on it assumes at or about the end of the rearward stroke at which time the port 36 is open or partiail' open. "The operating fluid then passes into the 1nte rior of the piston 32 and acting on the-rear surface 40 impels it on its forward and percussive stroke. 'The'parts are so adjusted that the piston 32 impinges upon the-inner ously or approximately simultaneously with the placing of the interlor of the piston 32 in or when the port 36 isin communication with the annular recess 37 msldethe power-cyhnder 1. The ressure bemg now considerabl tial pressure acting on the annular. 'surface 41, formed by .the enlarged rear end of the ward stroke; .The awn 32 in its rearward movement acquires sutficlent momentum to .the inlet-port 36 back sirfiiclentlg far port 36 to im el iton its forward stroke. With the o ject of automat cally-put resilient orfiexible ring 34 and a rotecting through the port 27. In Fig. 2 t epistonlowered insi ethe piston 32, theair at the im-- fpiston-32, moves the pistonthrough its rearca to dflow the motive fluid topass throng the the machine out of operation ;in -the event-o any suitable polygonal section to fit apart of terior of the iston 32 through the port 36.

m communication with the recess '37 through extremity of the impact-piece 28 simultaner I 5 communication the-exhaust-ports 38 39 -ion 21,=revolubly mountedonthe rear end-of.

ing drilled a small port 42 is formed between the main supply-port 27 and the interior of the ower-cyl nder 1. In Fig. 6 the piston 321s 1l ustrated 1n the position it will assume under these circumstances. When it impingesupon the rear end' of the impact-piece 28 ,1t drives it forward in the bore of the cylin- ,der 1 until the rear end of the piston 32 overruns the small: port 42. When in this posi- '-tion, the piston 32 closes the main supplyport 27 and also closes the port 36 to exhaustback of the ston through the port 42.

(See Fig. 6.) The piston 32 1-S maintained in this position by the air which escapes to age y feeding -the machine or moving the powercylinder 1 forward the cutting endof the bit comes into contact with the rock-face and pushes the impact-piece 28 in av rearward direction in thecylinder 1. The impact-piece 28 at the same time moves the piston 32 backward in the cylinder l un'ttl the main supplyport 27 is uncovered-b the piston 32, which allows the motive flui-i -to act on the annular surface 41, and so return the iston 32 to the rear end of the cylinder 1. r or the purpose of passing a'jet' or quantity of the operating,

fluid through the impact piece and, if desired, through the drill or bit in order to prevent the'overheating of the same and at the same time toJblow'awa'y the cuttings from between the cuttin bottomof the hole a hole 43.

edges of the bit and the is formed through the impact-piece 28, longitudinally thereof 1 and communicating with a hole -formed longitudinally ofthe 'drillrbit. A small ap erture 44 is formed longitudinally of the piston-32, which allows a quantity of the mo- 42 ton 32 into the cylinder 1 at the front of the -tive" fluid to pass from the interior of the pispiston 32'and rear of theimpact-piece 28,

i'whence it passes through the hole 43 in the impact-piece 28 and then through the drill or '45 2 -In Fig. 7, illustrative of a modification of the-arrangement shown'in Figs. 1 to ,6, the 'cylinder 1 is slidably supported the for- 7 award guide 3 and loosely carriedat the other slide in the longitudinal and central member bit torthe cutting edges of the latter.

end by thesleeve 5, which is constructed to z 2 of the shell or cradle'in a similar-manner to that described with reference to F1 ner efiected through the medium ofthe pinrear end ofthecylinder 1. 1 Inst'eadofqour:

aling the feed-screw-13in the front guide 3 applied in the construction of a machine or the cylinder 1.

. 1 to 6. The rotation of the cylinder 1 is in he maniece 28 is driven back ln-the' cylinderjl by "in the. forward ndrear end of; thershell or cradle "2-1t. is in his case journaled in andcarriedby the lower; ndfi of the-sleeve 5 and the feed-nut is guide: 3.1 'As. thescrew 13 j is rotatedv by means of the crank 16. it works through the stationary feed-nut 1-0, and so traverses the cylinder 1v longitudinally of the shell or cradle 2.

Referring. to the arrangement illustrated in Figs; 8 and,9, illustrating theimprovements engine in which the admission of the actuating fluid to the cylinder is controlled by means of a valve, 45 represents the valve, which is located in a valve-box 46, arranged at the rear end of the cylinder 1. 'The valve may be of any ordinary or suitable construction-a's, for example, similar to the valve of an axial-valve chipping or riveting machine. In a, recess in'therear end of the cylinder is arranged a ring'47, and nextthe ring 47 is arranged the valve 45 and valve-box 46. The valve 45 operates toadmit the fluid alternately through the center of the ring 47 to the rearend of the cylinder 1 and piston 32 8 and along the port 27 to the forward end of 17 is the cap or cover for the rear end-of the cylinder 1, which incloses the valve-box 46, which cap 17 is constructed with theteeth 18 and flange 19 similar to the preceding-construction, and 23 is the nipple, 24 the screw-union, and 25 the actuat1ng-- fluid-sup ly pipe, which serve for conducting said fluid into the-valve-box 46. v 2 is the shell or cradle,formed with the cone 2, and 3 95 the front guide, in which the cylinder 1 is slidably mounted. The feed-screw 13 in this arran ement, as in Figs/ 1- to 6, isjournaledat x 114 in the front guide 3 and at in the rear.

end of the shell or cradle 2. It is formed with a longitudinal feather-way ,on which slides the pinion 21, fitted with the feather-key to rotate the cylinder'l, and the feed-nut. 10 is "carried bythe sleeve 5, which latter is also sha ed to slide in the guideways 8-, formed-in the ongitudinal member of the shell or cradle 2. .The' front head 33,- resilient pad 34, pro- I tecting-ring 35, and impact-piece 28 are also of the construction illustratedin Figs. 1 to 6. Fig. 9 illustrates the position the piston 32 assumes when it drives the impact-piece 28 forward as a result ofthe cutting end of the drill or bit not coming into contact with the rock or bottom ofthe hole beingdrilled. In. this position anyfluid leaking round the piston 32 from theport 27 escapes from thefront of the piston 32thr'ou h the port 48, and s0 prevents such leakage omimpelling the pie ton 32 onits rearward-stroke until the impacti eedin the machine forward orotherwise. In "g. 10 we-illustrate' the machine shown in 8. andj9, but arrange the feed-nut 10 'de Binstead ofin the sleeve I 1 2 (s a use hat the e 5 3. o s w th he i" dr.- and. 5 traver'sed .longitud m lyp hel j radle 2 by re n i thwu hihe ii ien r k e a 1 5 and journal t e feed screw 13 in the sleeve nut 10. I

What we claim as our invention, and desire to protect by Letters Patent, is

1. A rock-drilling machine or engine comprising in combination a drill-cylinder carrying the percussive apparatus, a shell or cradle provided with a forward guidein which said cylinder is slidabl mounted, a loose sleeve encircling said cy inder constructed to slide in guideways formed in said shell or cradle, a feed-nut carried'b said sleeve,'a feed-screw stationarily carrie by said shell or cradle, and

means for rotating the screw to traverse the sleeve and with it the cylinder longitudinally of the shell or cradle 2. In a rock-drilling machine or engine, in combination, a drill-cylinder carrying percussiveapparatus, a shell or cradle provided with a front guide in which said cylinder is slidably and rotatably mounted, a sleeve encirclin .said cylinder, connections for giving a slidahle engagement between the sleeve and the shell, and connections comprising a rotatable shaft, for advancing and retracting the cylinder aforesaid, and'gearing between said shaft and the cylinder, for rotating the latter, upon rotation of the shaft aforesaid.

3. In a rock-drilling machine or engine, in

combination, a drillcylinder carrying percussive a paratus, a shell or cradle with which sai cylinder is slidably and rotatably mounted, connections for advancing and retracting the cylinder, comprising a feed-shaft which rotatablyengagesa part carried by the cylinder, and gearing between said shaft and cylinder for rotating the latter upon rotation of the feed-shaft aforesaid.

4. In a rock-drilling machine or engine, in

combination, a drill-cylinder carrying'the percussive apparatus, a shell orvcradle in which said cylinder is slid ably mounted, a feed-nut carried by said shell or cradle, a feed-screw revolubly carried by the cylinder working through the feed-nut to move the cylinder longitudinally of'the shell or cradle, and gearing between the cylinder and feed-screw for rotating the cylinder. by the rotation of the feed screw.

5. In a rock-drilling machine or engine, in combination a drill-cylinder carrying the percussive apparatus a cap or cover fitted at the rear end thereof said cover being formed with circumferential teeth, a shell or cradle in which said cylinder is slidably mounted, a feedscrew, a nut for traversing the cylinder longitudinally of its shell or cradle, a pinion carried by said feed-screw, means for compelling said pinion to rotate with said screw while permitting it to slide longitudinally thereof and means for maintaining the pinion in gear with the circumferential teeth on the cap or cover. a

6. In a rock-drilling machine or engine, in combination, a drill-cylinder carrying the percussive apparatus, a cap or cover fitted at the rear end thereof said cover being'formed with and forme circumferential teeth, a she'll or cradle in which said 0 linder is slidably mounted a feed -nu t an a feed-screw working tljii'ethrough for traversing the cylinder'longitudinally of its shell or cradle, a pinion c'airiefiby said feed screw formed with a feather-key en gaging a feather-way formed longitudinally of the feed-screw so that the pinion is compelled to rotate with said screw and permitted to slide longitudinally thereof, m'eans'for main taining saidpinion in gear with the circu'inferential teeth on the cap or cover and means for rotating the screw to feed the drill and at the same time rotate the cylinder, substantially as described.

7. In a rock-drilling machine or engine, in combination, a drill-cylinder carrying percussive apparatus, a cap or cover fitted at the rear end thereof, said cover being formed with circumferential teeth, a shell or cradle in which said cylinder is slidably mounted, a sleeve revolubly supporting the rear end of said cylinder and provided with ribs orwin s which traverse guideways formed in the she ll or cradle, a feed-nut and a feed-screw working therein for traversing the cylinder longi-' tudinally of its shell or cradle, a pinion carried by said feed-screw formed with a feather key and engaging a feather-way formed longitudinally of the feed-screw so that the pinion is com elledto rotate with said screw, to slide longitudinally thereof, means for maintaining said pinion'in gear with the circumferential teeth on the cap or cover, and means for rotating the screw to feed the drill and at the same time rotate the cylinder, substantially as described.

8. In arock-drilling machine or en ne, in

combination, a drill-cylinder carrying t 1e percussive apparatus, anim act -piece located in the front end of said cy inder which serves to receive and transmit the impacts of the percussive apparatus to the drill'or bit, means for compelling the drill or bit to rotate in unison with the cylinder, a shell or cradle in which the cylinder is slid ably mounted, means for mounting said shellor cradle, a sleeve in which the cylinder is revolubly supported at the rear end, a feed-screw and a feed-nutfor movingthe cylinder longitudinally of its su porting casin and gearing carried by t e feed-screw an cylinder for rotating the latter when the screw is rotated to feed the drill, substantially as described.

9. In a rock-drilling machine or en ine", in combination, a drill-cylind er carrying t e per-' cussive apparatus, an impact-piece located in the front end of ,said cylinder which receives front guide in which the cylinder is slidably mounted and constructed to form longitudinal'guideways, means for mounting said shell or cradle, a sleeve in which the cylinder is rev- 5 olubly supported at the rear end, said sleeve I5 inion carried by the feed-screw fitted with a eather-key sliding in the longitudinal featherway in'said screw so that the pinion is compelled to rotate with the screw and permit ted to slide longitudinally thereof, means for 20 rotating the screw to move the cylinder longitudinally of the shell or cradle and to simultaneoiisly'rotate said cylinder and me'ans'for I gaging said teeth and connections for rotatwitnesses.

introducing the motive fluid into 'said-cylin i der, substantially as described. 10. In a rock-drilling machine or engine,

' combination, a drill-cyliiid er carrying percussive apparatus, a shell or cradle provided with a front guide in which said cylinder is slid ably and rotatably mounted, a sleeve encircling said cylinder, connections for giving a slid able engagement between the sleeve and the cradle,

a cap at the rear of the cylinder and provided with circumferential gear-teeth for which the aforesaid sleeve-acts as a shroud, a Pinionening thepi'nion.

In witness whereof we have hereunto set Our hands in the .presence of two subscribing HENRY HELLMAN. LEWIS OONDICT BAYLES. Witnesses: CHAS. OVENDALE,

- -R. OVENDALE. 

